I've created two layers, one with a ladder and the player,and one layer on top, with an other ladder. Basically I want to do this (i will post a picture of my evensheet) :

When the player climb the ladder on the main layer (up or down) : Set animation to ClimbBack (you see the player back, he is on top of the ladder)&When the player climb the ladder on the layer on top (up or down) : Set animation to ClimbFront (The ladder is on top of the player so you see his face behid the ladder)